The minute hand of the watch is 9 cm long and the hour hand is 6 cm long. What is the distance traveled by the needle tip of the minute hand in (1) 1 hour? (2)/kloc-What is the area swept by the hour hand in 0/2 hours?
3. The original price of a schoolbag is 50 yuan, and the "June 1st" activity is 15% off. How much is this schoolbag cheaper than the original price?
4. There are 220 students in Grade One in Yuhong Primary School, more than Grade Two 10%. How many students are there in Grade One and Grade Two?
There are 400 people in a company, and today the absenteeism rate is 2.5%. How many people are present today?
6. A supermarket engages in activities, and all goods are 15% off. Mom bought a microwave oven, which is cheaper than the original price. 45 yuan, what is the original price of this microwave oven?
7. Jia Xiaohong's food expenditure in June 5438+February accounted for 55% of the total expenditure, clothing expenditure accounted for 5% of the total expenditure, and other expenditures accounted for 40% of the total expenditure. (1) Food expenditure is more than other expenditures. 300 yuan, what's the total expenditure this month? (2) What are the other expenses and clothing expenses in June 5438+February?
8. The school bought 560 story books last year and 700 this year. What percentage of story books did it buy this year?
9. Draw the largest circle in a square with a side length of 8 cm. What is the area of this circle?
10 in October 10 and Xiaoming 150 tons, and February 180 tons. (1) What is the proportion of water consumption in February compared with that in June? (2) What percentage of water was saved in June 5438+ 10 compared with February?
(3) If the water consumption in March is 2% more than that in February, and the water fee per ton is 1.8 yuan, what is the water fee payable in March?
1 1. The circumference of the rectangle is 28 cm. The length-width ratio of this rectangle is 4: 3. How many centimeters is the length and width of this rectangle?
12. The ratio of degrees of the three internal angles of a triangle is 2: 3: 5. What are the degrees of the minimum angle and the maximum angle of this triangle?
13, story books account for 65% of the total collection in the school library, science and technology books account for 25% of the total collection, and there are 3600 story books and science and technology books. How many books are there in the school library?
14. The length of the rectangle is 25m, and the width is 20% of the length. What is the area of this rectangle?
15. Uncle Wang deposited 5,000 yuan in the bank for five years at an annual interest rate of 3.6% and interest tax of 20%. What is the due principal and interest of Uncle Wang?
1 . 50 . 24/2/3. 14 = 25. 12/3. 14 = 8m，
So the area of this circle is: 8*8*3. 14=200.96 square meters,
2.3 . 14 * 15 * 2 * 60 = 5652(cm)3. 14 * 15？ ×60=42390 (square centimeter)
3.50 times (1-0.85)=7.5 yuan.
4.220+220 times (1+0. 1)=462 people.
5.
It's too difficult to answer. Do it yourself No, I'll give you the answer.